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Field coil drivers
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<blockquote data-quote="Ingvar Ahlberg" data-source="post: 1062754" data-attributes="member: 15447"><p>Beautiful samples of a classic, [member=2475]Agaton Sax[/member] those will suffer from the main problem with field coil drivers, as those have a sensitivity of +103 dB there will be a very audible 100 Hz hum from the ripple on the DC supply from that, realy lousy, 120-250 power unit, a main problem with all field coil drivers as they all tend to be of high sensitivity, there will always be a hum from the coil power source.</p><p></p><p>If You don?t go the lead/acid battery way possible with low voltage coils used in many vintage and all presently available field coil drivers,</p><p>then You would have no idle hum from a +100 dB driver fed by a 100 AH car battery, some slight hiss will be there if You put Your ear to the driver but otherwise silent, until You drop the cartrdidge onto the record.</p></blockquote><p></p>
[QUOTE="Ingvar Ahlberg, post: 1062754, member: 15447"] Beautiful samples of a classic, [member=2475]Agaton Sax[/member] those will suffer from the main problem with field coil drivers, as those have a sensitivity of +103 dB there will be a very audible 100 Hz hum from the ripple on the DC supply from that, realy lousy, 120-250 power unit, a main problem with all field coil drivers as they all tend to be of high sensitivity, there will always be a hum from the coil power source. If You don?t go the lead/acid battery way possible with low voltage coils used in many vintage and all presently available field coil drivers, then You would have no idle hum from a +100 dB driver fed by a 100 AH car battery, some slight hiss will be there if You put Your ear to the driver but otherwise silent, until You drop the cartrdidge onto the record. [/QUOTE]
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Audio and Video Talk
General Discussion
Field coil drivers
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